#define _CRT_SECURE_NO_WARNINGS
//1+2+3+...+100
#include<stdio.h>
int main()
{
	int i = 0;
	int sum = 0;
	for ( i = 0; i <=100; i++)
	{
		sum = sum + i;
	}
	printf("%d", sum);
	return 0;
}